I'd need 5 auto tuners and the configuration would require that the be
close to in sync.
These are center fed, half wave dipoles. I've had excellent results on
40 and 75. Unfortunately with the common mode choke and BuryFlex
hanging from the center. It requires a LOT of tension to keep the
antennas straight...About 200# worth. There's a lot of 5/16ths double
braid rope already on the tower through pulleys, making working on the
antennas easy, but I don't think the 5 auto tuners would be practical.
73, Roger (K8RI) .
On 8/17/2017 Thursday 3:20 PM, Rod Greene wrote:
Or use an auto tuner at the feedpoint to match the slopers on whatever
band/freq you want to use. That's what I do.
73, Rod/w7zrc
------------------------------------------------------------------------
*From:* Roger (K8RI) on TT <K8RI-on-TowerTalk@tm.net>
*To:* "towertalk@contesting.com" <towertalk@contesting.com>
*Sent:* Thursday, August 17, 2017 12:33 PM
*Subject:* [TowerTalk] Broadbanding 80 meter dipole
I've seen a few possibilities in the past, but I'd like to add a dew
slopers to come up with the 5 used for some directivity, gain and front
to back. Switched coils at the feedpoint with frequency sensing would
likely work. I've had excellent results with just a couple switched
slopers on 40.
To complicate things I'd like to do this and maintain the dual band 75 /
40 meter operation, which would likely require separate feedlines. The
unused line would / could end up as a stub. I could possibly use the
frequency sensing to disconnect the coax for the unused band.
Thoughts?
--
73
Roger (K8RI)
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com <mailto:TowerTalk@contesting.com>
http://lists.contesting.com/mailman/listinfo/towertalk
--
73
Roger (K8RI)
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|